[R-390] Did the LF Mod today. . .

blw [email protected]
Tue, 22 Jul 2003 22:22:45 -0500


> How does it work? VERY WELL, right down to 10KHz the lower limit of my LF
> tunable preamplifier.  Oh yes, sensitivity at the input to this mod is very
> low as you're bypassing the RF amplifier tube and feeding the cathode of the
> first mixer.  I have a 35 dB Tunable pre-amplifier which also contains a 500
> KHz low pass filter.  With that unit the R-390A makes a decent LF set.  BUT,
> it is a little tedious on the wrist if you chase beacons for lone periods of
> time like I do 8^)
> 73 de Phil, KO6BB

Phil,

Knowing how those beacons cluster up I suggest using the BFO knob a little
to go up and down some to fudge on the tuning. This should be your 'fine
tuning' method to save on the wrist. I did catch a few above 500 beacons
with my stock PH-56 with the Quantum loop. Wow. That was a great night. I
did the same thing with the BFO tweaking.


Barry